Though the Ibex is a wider board, a 134 is still too small for someone of 170 pounds, I would even recommend a bigger board for the 145 pound rider. A 139 Vault would be a better option for weight range. Or check out a 139 O'Brien Decade! Not the most expensive and one of the easiest riding boards on the market that still shreds!

Let me know how the toe side feels on the vault. I know it's not the typical symmetrical set up, I just don't know how much of a difference it makes. They say it makes the toe side edge easier to get into than a typical board.